Photographic roll-film.



J. BREWER.

PHOTOGRAPHIE HOLL FILM.

APPLlcATloN FILED fia.4.1915.

Joseph Brewer ATTORNEYS may JOSEPH BREWER, OF NEW YORK, N: Y.

PHO/TOGRAPHIC ROLL-FILM.

Specification of Letters Patent.

Patented Nov., 9, i915.

Application filed February 4. 1915'. Serial No. 6,038.

To all whom 'it may concern:

Be it known that l, JOSEPH BREWER, a citizen of the United States, and aresident of the city of New York, borough of Manhattan, in the countyand State of New York, have invented a new and improved PhotographicBoll-Film, of which the following is a full, clear, and exactdescription.

The invention relates to photography, and its object is to provide a newand improved photographic roll film arranged to permit the removal ofIone or a number of exposed sections of the film forseparatelydeveloping such removed section or sections in case theremoved sections require more or less time for development than theremaining roll film sections.

in order to accomplish the desired result, use is made of a roll filmhaving single eX- posure film sections, the sections being separablyconnected with each other to allow removal of any one of the sectionsafter the exposures have been made for independent developing oftheremoved section relative to the remaining film roll sections.

A practical embodiment of the invention is represented in theaccompanying drawings forming a part of this specification, in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure 1 is a face view of the roll film, its protective ribbon and itscarrying spool; Fig. 2 is a like view of a single detached section ofthe roll film; Fig. 3 is a similar View of a pair of detached tenedtogether for simultaneous development and independent of the remainingroll film sections; Fig. 4: is a longitudinal section of the roll'filmon the line 4--4 of Fig. l; Fig. 5' is a similar view of the connectedfilm sectionson the line 5-5 of Fig. 3; Fig. 6 is a face view of theouter end of the opaque vvprotective ribbon; Fig. 7 'is a perspectiveview of one ofthe fastening devices for fastening the film sectionstogether and Fig. 8 is a face view of a preferred form of the roll film.

The roll film A is wound on a spool B together with the usual opaqueprotective ribbon C, andthe roll film A is formed of a series ofsensitized exposure sections A which be in one continuous strip, asshown in Fig. 8, with the sensitized film sections separated b f' tion Afrom the adjacent onesafter the exroll film sections fas- 'f atransverse .row of perforations A? to permit of separating any one filmses;

posures have been made to allow of developing the removed sectionindependently of the remaining film sections. The sensitized filmsections may, however, be spaced apart and 6o connected with each otherat adjacent ends by connecting strips D of paper or other flexiblematerial, as shown in Figs. l, 2, 3, 4 and .Fach of the connectingstrips D is provided witha transverse row of perfora- 6.5v tions D toallow of separating any one of thesaid lm'sections from the adjacentone,l the same as above described in reference to 4the roll film shownin Fig. 8.

rhe first film section A of each roll film 7o A is connected at itsstarting endby a strip E with the ribbon C (see Figs. l and 4) to permitof properly winding up the roll film on the winding-up roll in thecamera. The outer terminal C" of the ribbon C extends beyond theattaching strip E to allow of connecting the ribbon with the winding upspool prior to unrolling the film A inthe camera for making the firstexposure on the first film section.

Each connecting strip D is glued, pasted o-r cemented to the adjacentends of successive sensitized film sections A, and the strip as Well asthe adhesive material used 'must be water and acid-proof to withstand 85the treatment while undergoing developing, washing and fixing. Inpractice, each row of perforations D is adjacent the end of the nextfollowing filmv section A and divides the strip into two parts D2','D3,so that 90 when theadjacent film sections are separated along the row ofperforations D then the portion D2 of the-connecting strip D on thepreceding section is of a sufficient .length to provide a convenientmeans for holding the film section without danger of touching thesensitized layer. Each connecting strip D is further provided onopposite sides of the row of perforations D with pairs of apertures Fand F', of which the apertures F l0@ also pass through the correspondingfilm section to permit of fastening the remaining roll film sectionstogether after one or two of the otherI sections have been removed. ForthisV purpose use'is madeiof -fastening 105 devices G, suchA as shown inFig. 7, adapted to engage the Apairs of apertures F,`F when noved inregister 'with each other, that is, when superimposing the long end of aconnecting strip .D of one section A with the 'short portion of aconnct'ingstrip D of another film section A'. Ina like manner if two,three or more film sections Av'have been removed from the roll film thensuch detached sections can be readily connected with each other by theuse of the clips G, as

shown in Fig. 3, to permit of developing the removed film sectionssimltaneously..l The 'fastening devices G must be of a chemical-1 proofmetal or coated with an acid-resisting enamel, so that the developingliquid or fi-xing bath is not affected by the metal.

The film shown in Fig. 8 is provided with pairs of apertures F3 onopposite sides of the transverse row of perforations A2' to permitoffastening the remaining sections of a film together by the use offastening devices after one or more such film sections have been removedfor the purpose previously mentioned. l

Thepfilm sections, as shown in Fig. 8, have theirsensitized portionsterminating a distance from the perforations A2 and the apertures F3 toprovlde non-sensitized holding portions A3 at each end' of a film sec-It is understood that the film is used in the camera in `the usualmanner and the film l sections are provided with the usualvidentification marks, preferably consecutive numerals, to permit ofidentifying each section, and also to show such character in the usualobservation window when winding up the film to display the unexposedfilm secl tion to the lens of the camera. Afterthe exposures have beenmade and the film has been removed from the camera and taken to the darkroom any one film section A can be detached from the remaining one anddeveloped separately. The remaining film sectlons are again connectedwith each other` by the use of the fastening devices Gr to allow ofdeveloping the samefas a unit. As previously stated, several filmsections may be removed and fastened together for simultaneousdeveloping, as indicated in Figs. 3

.and 5.v

Having thus described my invention, I claim as new and desire to secureby Letters Patent:

1. A roll film haviiicggsingle exposure sections separably connectedwith each-other by r transverse lrows of aperturformed intheapertures-on opposite sides ofa rowof perforations, and fastening meansadapted to engagethe-apertures ofthe separated endsv of the remainingroll film sections .to allow of developmgthe remaining film rollsections as a 'smgleum'tV A roll film, comprising a continuous striphaving sensitized exposure sections and having transverse rows ofperforations separating the sections from each other to permit ofremoving any. one or several of the sections for separate developmentfrom the remaining sections, and means for fastening together theseparated ends of the film roll to allow of developing the remainingfilm roll sections as a single unit.

3. A 'roll film, comprising a continuous strip having sensitizedexposure sections and having transverse rows of perforations separatingthe sections from. each other to permit of removing any one or severalof the sections, the strip being provided' tiri-.opposite sides of eachrow of perforations with sets of apertures, and a fastening deviceadapted to engage the apertures of the separated ends of the film rollto allow of developing vthe remaining film roll sections as a singleunit.

4. A roll film having single exposure sensitized film sections andnon-sensitized holding portions adjacent the ends of each sensitizedfilm section, the said non-sensitized holding portions havingrows ofperforations separably connecting adjacent non-sensitized holdingportions;

5. A roll film having single exposure sensitized film sections andnon-sensitized holding portions adjacent the ends of each sensitizedfilm section, the said non-sensitized holding portions having rows ofperforations separablv connecting adjacent non-sensitized holdingportions, the latter also having -pairs of apertures on opposite sidesof each row of perforations.

In testimony whereof I have signed my name to this specification in thepresence of two subscribingwitnesses.

JOSEPH BREWER."

Witnesses:

THEO. G. Hosrnn, PHILIP D. RoLLHAUs.

Copies of this patent'pmayfrhe obtained for lfive cents each, byaddressing the Commissioner of Patents,

' Washington, D. C.

